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Analog Devices Inc./Maxim Integrated MAX16035LLB46+T
- Part No.:
- MAX16035LLB46+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 10-WFDFN
- Datasheet:
-
MAX16035LLB46+T.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 10UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,122
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Product details
Overview
The MAX16035LLB46+T from Maxim Integrated is a low-power, 10-pin μDFN supervisory circuit designed for battery-backed SRAM retention and microprocessor reset management in portable and industrial systems. It features a factory-set 4.63V reset threshold (L = push-pull RESET), active-low battery-on indicator (BATTON), power-fail warning (PFI/PFO), and operates from 1.2V to 5.5V with 13µA quiescent current. It is used in POS terminals and set-top boxes requiring reliable brownout detection and seamless battery switchover.
For engineers reviewing the MAX16035LLB46+T datasheet, MAX16035LLB46+T pinout, MAX16035LLB46+T application, or MAX16035LLB46+T equivalent, key selection criteria include its 4.63V reset threshold accuracy, BATTON push-pull output behavior, 10-pin μDFN-10 package compatibility, and support for VCC-to-BATT switchover with ≤40mV hysteresis - all critical for battery-backed memory integrity in compact embedded designs.
Technical Context
The MAX16035LLB46+T implements a precision voltage-monitoring architecture with independent comparators for VCC (reset generator), PFI (power-fail), and BATTON control logic. Its internal 1.235V reference enables accurate threshold generation for both primary supply monitoring and auxiliary inputs like RESETIN (on other variants), though MAX16035 lacks RESETIN functionality per pin table.
It integrates a dedicated battery-switchover MOSFET path between BATT and OUT, with on-resistance specified at 3.1Ω (VCC=4.75V, IOUT=150mA) and temperature-stable performance down to -40°C. The device asserts BATTON high only during valid battery-backup mode (VCC < VTH and VCC < VBATT), and maintains RESET assertion for ≥140ms after VCC recovery - ensuring deterministic µP initialization under brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 4.63V (factory-set, ±0.12V tolerance), ensures reliable reset assertion before 5V system brownout |
| Supply Voltage Range | 1.2V to 5.5V - supports operation during deep battery discharge and across standard logic rails |
| Quiescent Supply Current | 13µA at VCC=2.8V - enables multi-year battery life in backup mode |
| Battery Standby Current | 2µA max (-40°C to +85°C) - minimizes drain on backup cell when VCC=0V |
| Reset Timeout Period | 140ms minimum - guarantees sufficient µP reset hold time for full initialization |
| BATT-to-OUT On-Resistance | 3.1Ω at VCC=4.75V, IOUT=150mA - limits voltage drop and heat during battery sourcing |
| Operating Temperature | -40°C to +85°C - qualified for industrial and extended commercial environments |
Pinout & Package
MAX16035LLB46+T is housed in a 2mm × 2mm, 10-pin μDFN package with wettable flanks, optimized for space-constrained PCB layouts and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Drives µP reset input directly; sinks 20mA; remains asserted until VCC > 4.63V + 140ms timeout |
| 2 - CEIN | Chip-enable input | Unused in MAX16035; must be tied to GND or OUT per datasheet guidance |
| 3 - PFI | Power-fail input | Monitors external supply via resistor divider; trips PFO when voltage falls below 1.235V |
| 4 - GND | Ground reference | Primary return path for all analog and digital functions; requires low-impedance connection |
| 5 - MR | Manual-reset input | Debounced TTL/CMOS-compatible input; pulls RESET low when asserted; internal 20kΩ pullup to VCC |
| 6 - PFO | Active-low power-fail output | Push-pull output indicating PFI fault or VCC < reset threshold; drives NMI or interrupt lines |
| 7 - VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and sources OUT during normal operation |
| 8 - OUT | Regulated output | Connects to SRAM VCC; sourced from VCC or BATT depending on switchover state |
| 9 - BATT | Backup battery input | Accepts 2.1V–5.5V; activates switchover when VCC < VTH and VCC < VBATT – 40mV |
| 10 - CEOUT | Chip-enable output | Unused in MAX16035; internally pulled up to OUT when disconnected from CEIN |
Key Features
| Feature | Design Value |
|---|---|
| Factory-trimmed 4.63V reset threshold | Eliminates external resistor networks and improves long-term accuracy over temperature (±0.12V) |
| BATTON push-pull indicator | Provides unambiguous, low-impedance status signal for battery-backup mode without external pull-up |
| VCC-to-BATT switchover with 40mV hysteresis | Prevents oscillation during slow VCC decay and ensures clean transition to backup power |
| 13µA supply current at 2.8V | Extends shelf life of coin-cell backup sources in always-on applications |
| 140ms minimum reset timeout | Guarantees µP reset hold time exceeds typical boot sequence requirements |
| 2mm × 2mm μDFN-10 package | Reduces board area by >50% vs. SOIC-8 while enabling high-density routing and thermal performance |
Applications
| POS Terminals | Set-Top Boxes |
|---|---|
Use Scenario: Battery-backed SRAM retains transaction logs and configuration data during AC power loss or battery replacement. IC Role / Device Role / Timing Role: MAX16035LLB46+T monitors main 5V rail and switches SRAM supply to backup cell within 1µs of VCC falling below 4.63V. Use Value: Prevents data corruption during unexpected power interruption, meeting PCI PTS compliance for secure payment devices. | Use Scenario: Maintains real-time clock and channel tuning memory during brief grid dips or standby mode transitions. IC Role / Device Role / Timing Role: MAX16035LLB46+T asserts BATTON to enable backup regulator and holds RESET until stable 3.3V rail recovers post-brownout. Use Value: Enables instant wake-from-standby with zero channel reacquisition delay and no EPG data loss. |
| Industrial Controllers | Portable Medical Devices |
Use Scenario: Preserves calibration coefficients and alarm history in programmable logic controllers during field maintenance or power cycling. IC Role / Device Role / Timing Role: MAX16035LLB46+T uses PFI to monitor isolated 24V DC supply and triggers PFO interrupt before main CPU resets. Use Value: Allows firmware to log pre-failure diagnostics and initiate safe shutdown sequences prior to power collapse. | Use Scenario: Secures patient parameter storage and therapy settings in handheld glucose meters and infusion pumps. IC Role / Device Role / Timing Role: MAX16035LLB46+T provides 1.2V–5.5V operating range compatibility and draws only 2µA from CR2032 during 10-year shelf life. Use Value: Meets IEC 62304 Class C software safety requirements by guaranteeing non-volatile memory integrity across battery swaps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16035PLB46+T | Same 4.63V threshold and pinout, but open-drain RESET and PFO outputs | Requires external pull-ups; better suited for wired-OR interrupt buses or level translation | Select when interfacing with legacy µPs needing open-drain reset signaling or shared interrupt lines |
| TPS3808G33DBVR | 3.3V fixed reset threshold, SOT-23-6 package, no BATTON or switchover function | Lacks battery management; only provides basic reset and watchdog; no PFI/PFO or CE gating | Choose for cost-sensitive, non-battery-backed applications where only 3.3V reset supervision is required |
Compared with MAX16035PLB46+T, the MAX16035LLB46+T offers direct-drive push-pull RESET without pull-up resistors, simplifying layout and reducing BOM count; versus TPS3808G33DBVR, it delivers integrated battery switchover and status indication - essential for data-retentive portable systems.
Availability
MAX16035LLB46+T is available at Aetrix Electronics and suitable for POS terminals, set-top boxes, and industrial controllers requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant packaging.
Supply support for MAX16035LLB46+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power-management ICs for demanding industrial, communications, and consumer applications.
The MAX16033–MAX16040 family was engineered specifically for ultra-low-power, space-constrained battery-backed memory systems - delivering integrated reset, power-fail warning, manual reset, and switchover control in sub-4mm² packages.
FAQ
What is the exact reset threshold voltage of the MAX16035LLB46+T?
The MAX16035LLB46+T has a factory-trimmed reset threshold of 4.63V, with a guaranteed range of 4.50V to 4.75V across -40°C to +85°C. This value is fixed and cannot be adjusted externally - the "46" suffix in the part number explicitly denotes the 4.63V variant per Maxim's selector guide.
Does the MAX16035LLB46+T support battery switchover, and what is the hysteresis?
Yes, the MAX16035LLB46+T supports automatic battery switchover from VCC to BATT when VCC falls below the 4.63V reset threshold and is at least 40mV lower than VBATT. This 40mV hysteresis prevents chattering during slow VCC decay and is implemented in hardware - no external components are needed to configure it.
What is the function of the BATTON pin on the MAX16035LLB46+T?
The BATTON pin on the MAX16035LLB46+T is a push-pull output that goes high exclusively during valid battery-backup mode - i.e., when VCC is below 4.63V *and* VCC is less than VBATT. It sinks 3.2mA at 0.4V saturation and can drive LEDs or base circuits of external pass transistors, eliminating need for external level-shifting.
Can the MAX16035LLB46+T operate with a 1.2V supply?
Yes, the MAX16035LLB46+T is fully specified to operate down to 1.2V on VCC, maintaining RESET assertion validity and functional monitoring. At 1.2V, it still guarantees RESET remains active until VCC rises above 4.63V and holds for ≥140ms - critical for ultra-low-voltage backup scenarios where main rail collapses gradually.
Is the MAX16035LLB46+T pin-compatible with other devices in the MAX16033–MAX16040 family?
Yes, the MAX16035LLB46+T shares identical 10-pin μDFN-10 pinout and footprint with all MAX16033–MAX16036 variants. However, functional differences exist: MAX16035 includes BATTON but excludes RESETIN and watchdog; MAX16033 adds CE gating; MAX16034 adds WDI. Pin compatibility enables layout reuse, but feature mapping must be verified per variant.
MAX16035LLB46+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-µDFN (2x2)
MAX16035LLB46+T FAQ
1.How can I place an order for MAX16035LLB46+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16035LLB46+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX16035LLB46+T reliable?
The price and inventory of MAX16035LLB46+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16035LLB46+T is usually 5 days.
3.What payment methods are accepted for MAX16035LLB46+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16035LLB46+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16035LLB46+T?
MAX16035LLB46+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16035LLB46+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX16035LLB46+T?
For technical support, including MAX16035LLB46+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16035LLB46+T requirements.
6.How does Aetrix verify that MAX16035LLB46+T is sourced from the original manufacturer or authorized distributors?
All MAX16035LLB46+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX16035LLB46+T meets industry standards.
7.What is the process for return or replacement of MAX16035LLB46+T?
All MAX16035LLB46+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16035LLB46+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX16035LLB46+T part is unused and in its original packaging.
Return procedure for MAX16035LLB46+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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